<template>
  <view>
    <view class="seranch-box">
      <uni-search-bar  @input="input" :radius="100" placeholder="请输入搜索的内容" cancelButton="none"></uni-search-bar>
    </view>
    <view class="sugg-list">
      <view class="sugg-item" v-for="(item,i) in searchResults" :key="i" @click="gotoDetail(item.goods_id)">
        <view class="goods-name">{{item.goods_name}}</view>
        <uni-icons type="forward" size="16"></uni-icons>
      </view>
    </view>
    <view class="history-box" v-if="searchResults.length === 0">
      <!-- 标题区域 -->
      <view class="history-title">
        <text>搜索历史</text>
        <uni-icons type="trash" size="18" @click="claerHistory"></uni-icons>
      </view>
      <!-- 列表区域 -->
      <view class="history-list" >
       <uni-tag v-for="(item,i) in history" :key="i" :text="item" inverted  @click="gotoGoodsList(item)"></uni-tag>
      </view>
    </view>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        timer:null,
        kw:'',
        searchResults:[],
        historyList:['q','w','e']
      };
    },
    onLoad() {
     this.historyList = JSON.parse(uni.getStorageSync('kw'))
    },
    computed:{
      history(){
        return [...this.historyList].reverse()
      }
    },
    methods:{
      input(value){
        clearTimeout(this.timer)
        this.timer = setTimeout(()=>{
          this.kw = value
          this.getSearchList()
        },500)
      },
      async getSearchList(){
        // 判断搜索关键字是否为空
        if(this.kw.length === 0){
          this.searchResults = []
          return
        }
        let {data:res} = await uni.$http.get('/api/public/v1/goods/qsearch',{query:this.kw})
        if(res.meta.status !== 200) return uni.$showMsg()
        this.searchResults = res.message
        this.saveSearchHistory()
      },
      gotoDetail(id){
        uni.navigateTo({
          url:'/subpkg/goods_detail/goods_detail?goods_id=' + id
        })
      },
      saveSearchHistory(){
        let set = new Set(this.historyList)
        set.delete(this.kw)
        set.add(this.kw)
        this.historyList = Array.from(set)
        uni.setStorageSync("kw",JSON.stringify(this.historyList))
      },
      claerHistory(){
        this.historyList = []
        uni.setStorageSync('kw','[]')
      },
      gotoGoodsList(kw){
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?query=' + kw
        })
      }
    }
  }
</script>

<style lang="scss">
.seranch-box{
  position: sticky;
  top: 0;
  left: 0;
  z-index: 999;
}
.sugg-list {
  padding: 0 5px;

  .sugg-item {
    font-size: 12px;
    padding: 13px 0;
    border-bottom: 1px solid #efefef;
    display: flex;
    align-items: center;
    justify-content: space-between;

    .goods-name {
      // 文字不允许换行（单行文本）
      white-space: nowrap;
      // 溢出部分隐藏
      overflow: hidden;
      // 文本溢出后，使用 ... 代替
      text-overflow: ellipsis;
      margin-right: 3px;
    }
  }
}
.history-box {
  padding: 0 5px;
  .history-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 40px;
    font-size: 13px;
    border-bottom: 1px solid #efefef;
  }
  .history-list {
    display: flex;
    flex-wrap: wrap;
    margin-top: 5px;
  }
  .uni-tag {
    padding: 5px;
    margin-top: 5px;
    margin-right: 5px;
  }
}
</style>
